How to get a job in horticulture

I am 24 years I left school and did an apprenticeship in bricklaying since being on sites I've picked up many trade tips I now feel I would like a career in horticulture I'm paying for my own studying in level 2&3 in RHS principles of horticulture but would really like to get a job in horticulture to get me learning faster and to have a job at the end of my studying but I am finding it hard to find anything about can anybody help me with my problem and provide me with sum advice on what to do